#include "testlib.h"
#include <stdio.h>
#include <math.h>
int main(int argc, char * argv[])
{
    registerTestlibCmd(argc, argv);
    double n, k;
	n=ans.readDouble();
	k=ouf.readDouble();
	if(!doubleCompare(n, k, 1E-8)) quitf(_wa, "expected %.20lf, found %.20lf", n, k);
	else quitf(_ok, "answer is %.20lf, absolute error is %.20lf", n, n-k);
}